Transmission-gear.



A. J. MATHESON.

* TRANSMISSION GEAR.

APPLICATION FILED MAY 28, 1914.

Patented Apr. 4, 1916.

2 SHEETS-SHEET 1.

I b .m u v u THE col saiam PLANOURAPH C0,. WASHINGTON, n. c.

Ar]. MATHESON.

TRANSMISSION GEAR.

APPLICATION FILED MAY 28, 1914 1,177,880. Patented Apr. 4, 1916.

2 SHEETS-SHEET 2- H MI - UNITED STATES PATENT orrrou.

' ARCHIBALD J'. MATHESON, OF ROCKFORD, IOWA.

TRANSMISSION-GEAR.

To all whom it may concern:

Be it known that I, ARCHIBALD J. MATHE- SON, a citizen of the UnitedStates, residing at Rockford, in the county of Floyd, State of Iowa,have invented certain new and useful Improvements in Transmission-Gear;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to transmission gearing and has special referenceto an improved form of transmission gearing especially adapted for usein connection with an automobile or the like. I i I The principal objectof the invention is to improve and simplify the general construction ofgearing of this type.

A second object of this invention is to provide an improved form ofgearing wherein the drive at high speed will be positive while the driveat other speeds will be frictional.

With the above and other objects in view the invention consists ingeneral of certain novel details of construction and combination ofparts hereinafter fully'described, illustrated in the accompanyingdrawings, and specifically claimed.

In the accompanying drawings, like characters of reference indicate likeparts in the several views, and Figure 1 is a plan view of a portion ofan automobile chassis showing the gearing arranged thereon. Fig. 2 is asection on the line 2-2 of Fig. 1. Fig. 3 is a section on the line 33 ofFig. 1. Fig. 4 is an enlarged detail view showing a portion of theclutch control. Fig. 5 is an enlarged detail view taken through two ofthe friction wheels and showing the spring buffer arrangement thereof.Fig. 6 is an enlarged detail view showing the clutch for direct drive.Fig. 7 is an enlarged detail section on the line 7-7 of Fig. 1.

In the showing in the present drawings, which discloses one embodimentof the invention, there is provided an automobile Specification ofLetters Patent. Patented Apt 4 1916 Application filed May 28, 1914.Serial No. 841,587.

crank shaft 12 so as to provide a forward bearing for the power or driveshaft 15, a rear bearing 16 being also provided on the frame 10 for thisshaft 15. The shaft is thus normally free to rotate with respect to theshaft 12.

On the disk 14 there is provided aseries of clutch teeth 17 and splinedon the shaft 15 is a second friction disk 18 of smaller diameter thanthe first disk 14 and like it provided with clutch teeth l9which facethe clutch teeth 17 so that when the disk 18 is moved toward the disk 14the two clutches cooperate to lock the two disks together. The disk 18is provided with a hub 20 having a shipper groove therein and a shipperlever 21 is provided with the usual fork 22 for engaging said groove.Extending across the frame 10 is a rock shaft 23 whereon is mounted ahand lever 24 so that therock shaft may be rotated by the operator. EX-tending from this rock shaft is likewise a rock arm 25 which isconnected by a link 26 with the lever 21. At 27 is a second rock shaftwhich is arranged to be operated by means of a footpedal28 and dependingfrom this second rock shaft is a rock. arm 29connected by a link 30 withthe end of the lever 21 opposite its fork. This link 30 is guided in asuitable bracket 31 carried on the side of the frame. It will thus benoted that by means of either the pedal 28 or the lever 24 the disk 18may be moved to and fro along the shaft 15.

Mounted in suitable hearings on the frame 10 is a transverse shaft 32.On this shaft 32'is a friction disk 33 which is provided with a hub 34.At 35 is indicated one of the bearings for the shaft 32 and thisparticular bearing is provided with an inner sleeve 36 which is threadedinto the bearings and which butts against the hub 34.

Thus if the sleeve be revolved the disk 33 will be moved along the shaft32. Connected to the sleeve is an arm 36which extends radially from thesleeve and is connected by a link 37 with a rock arm 38 on the shaft 27.Formed on the hub 34 is the hub of a friction disk 39. Extending between the disks 33 and 39 are links '41 which are loosely secured toposts 40 on the said disks so that the disks will be prevented fromhaving relative rotary motion. The disks 33 and 39 are urged apart by acoil spring 41 which encircles the hub of the disk 39 and has oneendbearing against the said disk and the other end against the disk 33.

It will be obvious that when the two -disks 18 and 1e are so arrangedthat theclutches l7 and 19 are in engagement the shaft 15 will be drivenatthe same speed as the shaft 12. If, the lever 24 be now manipulated todraw the disk 18 away from the disk 1% and the pedal 28 be alsomanipulated to bring the two disks 33 and 39 into engagement with therespective disks 1% and 18 then the drive will be a friction drive andthe speed will depend on the distance of the disk 18 from the center ofthe shaft Furthermore the direction of the drive will depend upon theposition of said disk 18 to the front or rear of the center line of saidshaft It will thus be plain that a variety of speeds may be obtained byproper manipulation of the lever 24 and pedal 28.

There has thus been provided a simple and efficient device of the kinddescribed and of the character specified.

It will be obvious that many minor changes may be made in the form andconstruction of this invention without departing from the materialprinciples thereof. It is not therefore desired to confine the inventionto the exact form herein shown and described, but it is wished toinclude all such as come properly within the scope claimed.

Having thus described the invention what is claimed as new, is

1. In a friction gearing, a plurality of parallel friction wheels, meansto move said wheels axially, and yieldabie meansto permit movement ofone of said wheels independently of the other, said means comprising aspring located between said wheels.

2. In a friction gearing, a driving shaft,

a driven shaft, a friction gear fixed on said driving shaft, a secondfriction gear slid-"- 3. Inafriction gearing, a driving shaft,

a drivenshaft, a frictiongear fixed on said driving shaft, a secondfriction gear slidable on the driven shaft, a pair of friction gearsarranged at right angles to the first mentioned gears and each adaptedto engage a respective first mentioned gear, means to j move said pairof gears lnto and out of en-. gagement with the first mentioned gears,

a spring between the gears of said pair, and clutchteeth on each of thefirst mentioned gears whereby to lock said gearspfor syn chronousmovement.

In testimony whereof, I afliX my slgnature, in the presence of twowitnesses.

ARCHIE J. MATHESON.

Witnesses MILo- B Jranson, ARTHUR OHARRON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents} Washington, D. C.

